Field lens for an electrophotographic printing machine
US4111540A · kind A · utility
6Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 1976 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | May 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00265
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic printing machine in which the platen thereof is a field lens. In the opaque reproduction mode, the original document is positioned on the platen in a light receiving relationship with the illumination system. The presence of the field lens does not interfere with the opaque copying mode of the printing machine. When a transparency is being reproduced, the light image of the transparency is projected through the platen. The field lens converges the diverging light rays of the transparency light image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.